Fontmorigny Abbey was founded in 1149 as a daughter abbey of Clairvaux. Fontmorigny experienced major economic development from the Middle Ages, by means of the steel industry. It suffered in the Hundred Years' War and was sold as worker houses during the French Revolution.
The oldest parts of the building date back to the second half of the 12th century, while the convent buildings were rebuilt in the 18th century. Today the abbey is still on restoration and organizes exhibitions and a prestigious annual music festival.
The Church of St Donatus name refers to Donatus of Zadar, who began construction on this church in the 9th century and ended it on the northeastern part of the Roman forum. It is the largest Pre-Romanesque building in Croatia.
The beginning of the building of the church was placed to the second half of the 8th century, and it is supposed to have been completed in the 9th century. The Zadar bishop and diplomat Donat (8th and 9th centuries) is credited with the building of the church. He led the representations of the Dalmatian cities to Constantinople and Charles the Great, which is why this church bears slight resemblance to Charlemagne's court chapels, especially the one in Aachen, and also to the Basilica of San Vitale in Ravenna. It belongs to the Pre-Romanesque architectural period.
The circular church, formerly domed, is 27 m high and is characterised by simplicity and technical primitivism.